.nav-menu {
  width: 100%;
  height: 600px;
  background: url('../assert/banner.jpg') no-repeat;
  background-size: contain;
  position: relative;
  color: @white;

  .menu {
    color: @white;
    margin-left: 27.77777777777778%;
    padding-top: 2%;
    overflow: hidden;

    .submenu {
      float: left;
      margin-left: 20px;
      cursor: pointer;
      font-size: 16px;
    }
  }
}

@media screen and (min-width: 1440px) {
  .nav-menu {
    background-size: cover;
  }
}

@media screen and (max-width: 768px) {
  .menu {
    display: none;
  }
}

@media screen and (max-width: 1200px) {
  .nav-menu .menu .submenu {
    font-size: 12px;
  }
}